Most mercenary units fly flags on two flagpoles at their headquarters: one with their unit’s flag, and other bearing the flag of their current employer. However, the Third Regimental Combat Team—a.k.a. the Eridani Light Horse—leaves one flagpole bare, as a reminder of the death of the Star League, and the other pole flies the Light Horse’s unit and regimental flags at half-mast.

The battlefields of the 31st century are commanded by the BattleMech, 12-meter-tall, 100-ton bipedal engines of destruction. Fought by MechWarriors, commanded by neo-feudal officers, owned by national governments and band of mercenaries, these ’Mechs make every other ground combat vehicle obsolete. This is the warfare of fusion-powered giants. This is BattleTech.

For Ianthe, war is all too familiar. A former soldier in the Astra Militarum, she now serves Inquisitor Covenant as an agent of the Throne. Her first mission sees her investigating a cult called the Children of Eternity. Falling foul of the local Enforcers, Ianthe soon learns that war in the shadows is seldom straightforward and that the local, angry law-keepers are the least of her troubles.

For a thousand years, the Sabbat Worlds have been lost to the Imperium, claimed by the dread powers of Chaos. Now, a mighty crusade seeks to return the sector to Imperial rule. And at the forefront of that crusade are Colonel-Commissar Ibram Gaunt and the Tanith First and Only - better known as Gaunt’s Ghosts. Trapped in the grinding trench warfare of Fortis Binary, the Ghosts find themselves drawn into a conspiracy to assassinate the crusade’s leader, Warmaster Macaroth.

Exile to the miserable world of Sedh, the disgraced Necron Lord Oltyx is consumed with bitterness. Once heir to the throne of a dynasty, he now commands nothing but a dwindling garrison of warriors, in a never-ending struggle against Ork invaders. Oltyx can think of nothing but the prospect of vengeance against his betrayers, and the reclamation of his birthright. But the Orks are merely the harbingers of a truly unstoppable force. Unless Oltyx acts to save his dynasty, revenge will win him only ashes.